"metaclass conflict " error on MAC OS

[yingflower]

When I run with python 3.9.18

import phoenix as px

I got an error like this:

>>> import phoenix as px
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/Users/zhaofeirong/Develop/works/book_chat/fresh_env/lib/python3.9/site-packages/phoenix/__init__.py", line 6, in <module>
    from .session.session import (
  File "/Users/zhaofeirong/Develop/works/book_chat/fresh_env/lib/python3.9/site-packages/phoenix/session/session.py", line 41, in <module>
    from phoenix.core.model_schema_adapter import create_model_from_inferences
  File "/Users/zhaofeirong/Develop/works/book_chat/fresh_env/lib/python3.9/site-packages/phoenix/core/model_schema_adapter.py", line 11, in <module>
    from phoenix.core.model_schema import Embedding, Model, RetrievalEmbedding, Schema
  File "/Users/zhaofeirong/Develop/works/book_chat/fresh_env/lib/python3.9/site-packages/phoenix/core/model_schema.py", line 554, in <module>
    class ModelData(ObjectProxy, ABC):  # type: ignore
TypeError: metaclass conflict: the metaclass of a derived class must be a (non-strict) subclass of the metaclasses of all its bases
>>> 

I check the defination of ObjectProxy and ABC, they are really different.

[dosubot[bot]]

Hey, @yingflower! 👋 I'm here to help you with any bugs, questions, or contributions while you wait for a human maintainer.

The "metaclass conflict" error occurs when a class inherits from multiple base classes that have incompatible metaclasses. In your case, the ModelData class is inheriting from both ObjectProxy and ABC, which have conflicting metaclasses.

To resolve this issue, you can create a custom metaclass that combines the metaclasses of ObjectProxy and ABC. Here's a general approach to address this:

1. Define a Custom Metaclass: Create a metaclass that inherits from both metaclasses used by ObjectProxy and ABC.

2. Use the Custom Metaclass: Apply this custom metaclass to the ModelData class.

Here's an example of how you might implement this:

from wrapt import ObjectProxy
from abc import ABC, ABCMeta

# Define a custom metaclass that combines the metaclasses of ObjectProxy and ABC
class CombinedMeta(ABCMeta, type(ObjectProxy)):
    pass

# Use the custom metaclass for ModelData
class ModelData(ObjectProxy, ABC, metaclass=CombinedMeta):
    """pd.DataFrame or pd.Series wrapped with extra functions and metadata."""
    @property
    @abstractmethod
    def null_value(self) -> Any:
        pass

This approach should resolve the metaclass conflict by ensuring that the ModelData class uses a compatible metaclass that combines the necessary features of both ObjectProxy and ABC. Make sure to test this solution in your environment to confirm it resolves the issue.

To continue talking to Dosu, mention @dosu.

[yingflower]

It works, thanks.

[axiomofjoy]

Hey @yingflower, what version of Phoenix are you running that you are encountering this error?

[estebancatano]

I believe the issue is with the wrapt library, which was updated last week from version 1.16.0 to version 1.17.0.

Forcing the use of version 1.16.0 worked for me (poetry add [email protected]).

[axiomofjoy]

I'm not able to to reproduce the issue on Python 3.11 after syncing requirements. Feel free to open an issue if the problem persists!

[Doug-Bowen]

this is my exact issue. its caused by wrapt

[Doug-Bowen]

forcing 1.16 worked for me as well.

I also noticed that it would work on ubuntu just fine but fail on MacOS

[axiomofjoy]

@Doug-Bowen Are you using Intel Mac?

[Doug-Bowen]

Yep